"This Deluxe Toll House Mud Bars recipe is soooo easy to make. Chock full of morsels and nuts with a rich, chocolatey frosting...."
INGREDIENTS
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1 cup plus 2 tablespoons all-purpose flour
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1/2 teaspoon baking soda
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1/2 teaspoon salt
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3/4 cup packed brown sugar
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1/2 cup (1 stick) butter, softened
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1 teaspoon vanilla extract
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1 large egg
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2 cups (12-oz. pkg.) NESTLÉ® TOLL HOUSE® Semi-Sweet Chocolate Morsels, divided
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1/2 cup chopped walnuts